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Q21.21 Partial atrioventricular septal defect
BackQ21Congenital malformations of cardiac septaCategory7 →Q21.0Ventricular septal defectCategoryQ21.1Atrial septal defectCategory8 →Q21.10Atrial septal defect, unspecifiedCategoryQ21.11Secundum atrial septal defectCategoryQ21.12Patent foramen ovaleCategoryQ21.13Coronary sinus atrial septal defectCategoryQ21.14Superior sinus venosus atrial septal defectCategoryQ21.15Inferior sinus venosus atrial septal defectCategoryQ21.16Sinus venosus atrial septal defect, unspecifiedCategoryQ21.19Other specified atrial septal defectCategoryQ21.2Atrioventricular septal defectCategory4 →Q21.20Atrioventricular septal defect, unspecified as to partial or completeCategoryQ21.21Partial atrioventricular septal defectCategoryQ21.22Transitional atrioventricular septal defectCategoryQ21.23Complete atrioventricular septal defectCategoryQ21.3Tetralogy of FallotCategoryQ21.4Aortopulmonary septal defectCategoryQ21.8Other congenital malformations of cardiac septaCategoryQ21.9Congenital malformation of cardiac septum, unspecifiedCategory
CategoryCODABLE
Q21.21
Partial atrioventricular septal defect
EXAMPLES
Incomplete atrioventricular canal
Incomplete atrioventricular septal defect
Incomplete endocardial cushion defect
Ostium primum atrial septal defect (type I) with separate atrioventricular valves
Partial atrioventricular canal
Partial endocardial cushion defect
Incomplete atrioventricular septal defect
Incomplete endocardial cushion defect
Ostium primum atrial septal defect (type I) with separate atrioventricular valves
Partial atrioventricular canal
Partial endocardial cushion defect
- Chapter
- XVII · Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q20-Q28
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.